Nope. You have a great set up.
And your buckles are actually functioning fine although new tongues may be in order after the season. Ride them, you'll be fine.
Now or then, call rider service in Japan and ask for Kaz, the hardgoods specialist. Explain your situation and tell him that Chip in Bindings asked you to talk to him specifically. He and i will sort the details and Burton will send you parts after our conversation.
If that's too much off a hassle, walk into Murasaki in Shibuya and they should have parts for you.